Roller-bearing swivel wrench plate



C. L. HARRALSON.

ROLLER BEARING SWIVEL WRENCH PLATE.

APPLICATION FILED JULY 0. 1920. 'RENEWED DEC, 7,1921.

1 QQS, 1 (8 1 a Patented Jan. 1U, 1922,

2 SHEETS-SHEET l- C. L. HARRALSON.

ROLLER BEARING SWIVEL WRENCH PLATE.

APPLICATION FILED JULY 10, I920. RENEWED DEC. 7, I921.

1 1 1 Patented Jan. w 922.

2 SHEETS-SH GHARLES L. EARRALSQN, 0F BERGER,

RULLTlR-BELRIEG- SVQ'I'VEL WRENCH PLATE.

Application filed. July 10, 1928, Serial No. 395,263.

To all whom it may cancer 1t:

Be it known that 1, CHARLES L. Hernan- SON, a citizen of the UnitedStates of America, residing at Ranger, in the county of Eastland andState of Texas, have in vented certain new and useful Improvements inRoller-Bearing Swivel Wrench Plates, of which the following is aspecification.

.My invention relates to roller bearing swivel wrench plates, and theobject is to provide such plates for use with any suitable fishing tool,or bit for use in oil fields or water well drilling; and some of theadvantages are that the improved plate makes it possible for one man tomanipulate the bit or fishing tool where heretofore more men wererequired and to prevent the bits or tools from falling out of the wrenchwhile swiveling. This plate also prevents the operators from being hurtby the falling of the bits or tools and the plate is economical becausethe rollers overcome friction and the operation is made with less laborand in less time. There will be less liability of the bits or toolsslipping out of the wrench and stopping the holes. Other objects andadvantages will be fully explained in the following description and theinvention will be more particularly pointed out in the claims.

Similar characters of reference are used to indicate the same partsthroughout the several views of the drawings which form a part of thisapplication, reference to which is here had.

Fig. 1 is a plan view of the swivel plate. Fig. 2 is a verticalcross-section of the same with a section of a bushing which isdetachably mounted thereon. Fig. 3 is a section of a still smallerbushing. Fig. l is an inverted plan view of the swivel plate. Fig. 5 isan inverted plan view of the bushing shown in Fig. 3.

The improved plate 1 may be cast or machine made. It has the usualopening in the body to receive different bits or tools. Ihe plate hasrecesses in the underside to receive antifriction rollers 2 for runningon the yoke which supports the plate. This will make the plate moreeasily turned. The plate has curved depression provided with a bottompart 3 to receive the cylin drical portion of the tool and the terminalsof the wall of the cavity will prevent the tool or hit from slipping outbecause the Specification of Letters Patent.

Renewed December '7, 1921. Serial No. 529,716.

terminals 4i form shoulders or stops which are closer together than thefull width of the depression into which the shoulder of the toolprojects.

The rollers 2 are countersunk in the underside of the plate and projectjust far enough down to prevent the body of the plate 1 from rubbing onthe operating yoke.

In order to provide for difl'erent sizes of tools, a series of bushingor tools are provided and these bushings or tools have the same generalinterior contour as the plate 1 without the bushings or tools. Thebushings or tools will occupy the depressions 3. Figs. 2 and show onesize of a bushing 5, and Fig. 3 shows bushing 6 having a still smallerrecess 7 for a smaller bit or tool. Various other changes in the sizes,proportions and construction of the various parts may be made withoutdeparting from my invention. The bushings are made rigid with plate 1 bybolts 8 which project through holes 9. l

What I claim, is,

l. A. swivel wrench. plate provided with anti-friction rollers in theunder face thereof and having a tool receiving opening there through anda curved cavity in the upper face about said opening and a curved wallforming the boundary of said cavity and the terminals of said wallforming stop shoulders to prevent tools from slipping from said platewhile seated in said cavity.

2. A swivel wrench plate provided with antifriction rollers in the underface thereof and having a tool receiving opening therethrough and acurved cavity in the upper face about said opening and a curved wallforming the boundary of said cavity and the terminals of said wallforming stop shoulders to prevent tools from slipping from said platewhile seated in said cavity and means adapting said plate to hold toolsof difierent sizes.

3. In a swivel wrench plate provided with roller bearings partlycountersunk in the under face thereof and having a curved cavity, and aflat bottom and a tool receiving opening therethrough the wall of saidcavity being inclined and the terminals of said wall forming stops toprevent tools from falling from said plate, a bushing adapted to occupysaid cavity and having an exterior contour conforming to the interior ofsaid cavity and when placed in said cavity held in place by saidterminals,

g V eosiei and means for attacl'iing said bushingto hold tools ofdifferent sizes consisting of said plate. bushings having their bottomand exterior 4. A swivel Wrench plate provided with a surfaceseonformingin contour to said plate tool receiving opening therethronghand a and. having similar cavities and stop a curved cavity about saidopening and a shoulders adapted to rest on said plate and 1.5

curved Wall forming the boundary of said to occupy the eavity therein.cavity and thete-r-lninals of said Wall form- In testimony whereof, Iset my hand; this ing; stop shoulders to prevent tools from Qnd'dayofiJulyg A. 1)., 1920. slipping from said plate While seated in 10said.v cavity, said plate being adapt'ed-z to CHARLESLHABRALSQN.

